• A graph showing the transmission levels across different wavelengths for a bandpass filter, with a peak transmission at approximately 1535nm and a FWHM of 20nm.
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BP1535-20 Bandpass Filter(CWL=1535nm,FWHM=20nm)

BP1535-20 Bandpass Filter(CWL=1535nm,FWHM=20nm)

PN:SO3010044

$115.00 USD
$115.00 USD
Sale Sold out
Shipping calculated at checkout.
Center Wavelength (CWL) // FWHM
Optical Density // Peak Transmission (Tpk)
Filter Sizes

Enhanced NIR Filtering for Telecommunications

The BP1535-20 Bandpass Filter delivers exceptional performance in the near-infrared spectrum with a center wavelength of 1535nm and FWHM of 20nm. Engineered for telecommunications applications requiring enhanced spectral selectivity and superior wavelength discrimination in the critical C-band region.

Technical Specifications

  • Center Wavelength: 1535nm (near-infrared spectrum)
  • Enhanced Selectivity: 20nm FWHM for improved spectral discrimination
  • High Transmission: Superior light throughput at 1535nm
  • Sharp Cut-off: Excellent out-of-band rejection for clean signal isolation
  • C-Band Optimized: Perfect for telecommunications wavelength region

Telecommunications Applications

Perfect for fiber optic communications, wavelength division multiplexing (WDM), optical amplifiers, and telecommunications equipment. Ideal for C-band laser systems, optical networking, signal processing, and research applications where precise 1535nm wavelength control is essential for performance.

Enhanced Selectivity Design

The 20nm bandwidth provides enhanced spectral selectivity compared to broader filters, making it perfect for applications where precise wavelength isolation is important. Excellent for eliminating unwanted NIR wavelengths while maintaining good signal collection efficiency in telecommunications systems.

Professional Quality

Manufactured with precision optical coatings designed for consistent performance in demanding telecommunications environments. Each filter undergoes rigorous testing to ensure reliable performance in fiber optic networks, optical amplifiers, and telecommunications equipment requiring precise NIR wavelength control.

Transmission & OD Data

The transmission curve is typical. Actual data may vary from lot to lot, you can request the raw Transmission and OD data from us.

Copy the link of the product page and send email to shop@syronoptics.com to get raw data.

Shipment & Delivery

For stocked products, shipment will usually be made within 5 working days after order.

For customized products, shipment will usually be made within 4-8 weeks after order.

Return & Refund

Stocked Product are eligible to return within 7 days after receiving.

A flat rate of 35$ will be charged for returning.

Custom Sizing

Custom sizing is available for dimension under 60x60mm. Without mounting the thickness will generally ranging from 0.5-3mm.

For bigger size, contact shop@syronoptics.com for details.

Optical dicing refers to precision cutting processes used to segment optical materials, particularly those with specialized coatings, into smaller functional components while maintaining their structural and optical integrity. In the context of optical coating flats (flat substrates like glass, fused silica, or semiconductors coated with anti-reflective, dielectric, or other optical layers), dicing ensures these coated substrates meet exact dimensional requirements for applications in photonics, lasers, sensors, and semiconductor devices.

Methods

  • Saw Dicing: Diamond-coated blades for clean cuts with minimal chipping.
  • Laser Dicing: Non-contact ablation for delicate or brittle materials, reducing mechanical stress.
  • Plasma Dicing: Dry etching for ultra-fine features, ideal for advanced semiconductor wafers.

Price

Dicing Service will generally cost from $50 to $125 per piece. Depending on the accuracy and size you are requesting.

Packaging

If you need generic packaging, please leave "Generic" in the note when placing order.

In such case:

  • No Branding information in Packaging Materials
  • All Documentation will be generic
  • We will send image of the parcel to you before fulfilling shipment
  • You can use your document template for the shipment.

Feel free to contact shop@syronoptics.com for details.

Payment

Payment could be done online with Credit Card, Apple Pay, Google Pay, Wechat Pay and Alipay

For amount under $200 you can request to make payment within 7days after receiving the order.

View full details

Fequently Asked Questions

What are the Thickness of the Optical Filters?

For Mounted Optics:

  • 6mm (by Default)
  • 3.5mm (Specified in Order Note)

For Unmounted Optics:

  • 0.5mm
  • 1.1mm
  • 2mm

(most of the unmounted optics are having thickness of 1.1mm ~ 2mm)

What is the difference between mountings?

Unmounted:

  • a bare glass optical filter

Mounted:

  • Smooth Mount for protection of the optics. No thread is there on the mount.

Metric Mount:

  • Start with M as prefix, usually seens as M25.5x0.5mm. Mostly used as camera filters

Imperial Mount (Usually Thorlabs):

  • Start with SM as prefix, usually seen SM1, SM05 etc... Mostly used in Optical system. (You will have a SM external thread to connecting to other objects)

C-Mount:

  • Very frequently used mounting. C-Mount is 1‘’-32TPI. And it is not the same thing as SM1, or M25.5x0.5mm.

Standard Mountings

Camera Mounting List

  • Our filters can be cut to match the mounting on the list. Please contact us for getting quotation.

Need any help?

Other Wavelength

UV Bandpass Filter (100-400nm)

VIS Bandpass Filter (400-800nm)

NIR Bandpass Filter (800-1400nm)